A BGO-CsI(Tl) phoswich: A new detector for X- and γ-ray astronomy

Details A BGO-CsI(Tl) phoswich: A new detector for X- and γ-ray astronomy A BGO-CsI(Tl) phoswich: A new detector for X- and γ-ray astronomy

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986nimpa.243..572c&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 243, Issue 2-3, p. 572-577.

Physics

10

Scientific paper

The BGO pulse decay time, similar to that of NaI(Tl), allows the use of this high-Z scintillator as phoswich component instead of the largely employed NaI(Tl). We have verified the feasibility of this new type of detector for possible use in X- and γ-ray astronomy experiments. Measurements on two laboratory prototypes of BGO-CsI(Tl) phoswich have shown a remarkably good pulse-shape discrimination and excellent linearity performances across a wide energy interval (60-2000 keV). The only penalty is a slight reduction in resolution (essentially due to the poor light yield of BGO when compared to NaI), largely compensated by the high photopeak efficiency, even for small BGO thickness. We have also investigated the deviation of BGO from a pure proportional relationship between pulse height and photon energy, which turns out to be opposite to that of NaI(Tl).
Now at Istituto TE.S.R.E., CNR, Via dei Castagnoli 1, 40126 Bologna, Italy.

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